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Jim_Gunn · 12-05-2010, 02:49 PM

Quote:

Originally Posted by moeloubani

First bird http://www.ucmp.berkeley.edu/diapsid...aeopteryx.html

150 million years ago

And people say that the ones they evolved from were around 100 million years ago...but how can you evolve from something that comes after you? Impossible!

Edit: even earlier http://www.dailymail.co.uk/sciencete...years-ago.html and dinosaurs were just around since 250 million years ago so how could there be a first 'bird' from a dinosaur? They share a common ancestor like I said but birds didn't evolve from dinosaurs.

The archeopteryx in the first link could have evolved from dinosaurs that existed before it, and probably did taking into consideration the shape of hip bone and other morphological factors. It also may have been an evolutionary dead end meaning that it was not necessarilly ancestral to modern birds. The second example is not a bird at all- the article linked uses quotes to call it a "bird"- but a flying reptile. There were a lot of flying reptiles that existed at the same time as the dinosaurs, but they weren't birds either.